<template>
  <el-container class="home-container">
    <!-- 头部区域 -->

    <el-header>
      <div>
        <img src="../assets/heima.png" alt />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
            <!--  一级菜单的模板区域-->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
            @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由站位符 -->
        <router-view></router-view>

      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data(){
    return {
      //左侧菜单数据
      menulist:[],
      iconObj:{
        '125':'iconfont icon-users',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse:false,
      //被激活的链接地址
      activePath:""
    }
  },
  created() {
      this.getMenuList();
      console.log(this.menulist);
      this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      //清空token
      window.sessionStorage.clear()
      //跳转到登录页
      this.$router.push("/login")
    },
    //获取所有的菜单
    async getMenuList(){
        const {data:res}= await this.$http.get('menus');
        if(res.meta.status !==200) return this.$message.error(res.meta.msg);
        this.menulist = res.data;
        console.log(res)
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse(){
      this.isCollapse=!this.isCollapse;
    },
    //保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath);
      this.activePath=activePath;
    }
  }
}
</script>

<style lang="less" scoped>
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.el-main {
  background-color: #fff;
}
.home-container {
  height: 100%;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing:0.2em ;
  cursor: pointer;
}
</style>